/Engine/Plugins/Online/OnlineServices/Source/OnlineServicesInterface/Public/Online/Lobbies.h
Try to rejoin previously joined lobbies.
[TOnlineAsyncOpHandle](API\Plugins\OnlineServicesInterface\Online\TOnlineAsyncOpHandle)< [FRestoreLobbies](API\Plugins\OnlineServicesInterface\Online\FRestoreLobbies) > RestoreLobbies ( [FRestoreLobbies::Params](API\Plugins\OnlineServicesInterface\Online\FRestoreLobbies\Params) && Params )